Algebra Examples

$1 + - \infty$

Step 1

Replace all occurrences of $+$ $-$ with a single $-$ . A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because $1 \cdot - 1 = - 1$

$1 + - \infty$

Step 2

Infinity plus or minus a number is infinity.

$- \infty$